Preventive measures: 1. In the winter and spring, weeds are removed from the fields to eliminate the sites where the migratory locust will breed for winter.
2. Appropriate early sowing, adjust the sowing date, so that corn seedlings avoid the peak period of migration of Laodelphax striatellus.
3. Seed dressing before seeding, seed dressing of 0.2% to 0.3% of phorate; seed dressing of 3% carbofuran, dosage of 15% of seed; or 75% of 3911 EC was used for seed dressing, and the dosage was 0.3% of the seed amount.
4. Maize seedlings can be applied 40% to 5 leaf phases after spraying, and 40% of water-containing phosphorothiocyanate can be applied. The amount of 450-750 ml per hectare is sprayed with 300 kg of water; 1.5% of the powder can also be used at a dose of 30-45 per hectare. Kilograms of dusting, dusting once every 7 days, spray a total of 2 to 3 times.
Therapeutic measures: 1. Maize seedling stage once the infection of shrinkage disease should be actively taken to prevent spraying, can be used to plant disease spirit, bacteria g drug grams or virus A and gibberellins, multi-effect Ling and other plant hormones mixed spray, liquid concentration 600 Up to 1000 times liquid, it has a certain control effect on corn rough dwarf disease; applying zinc sulfate also has an inhibitory effect on corn rough dwarf disease.
2. The diseased plants and weeds should be promptly removed in the affected area. And bring it out of the field and concentrate or burn it. The weeds around the plots should be promptly removed to eliminate adult spawning sites. This can play a role in controlling the spread of maize rough dwarf diseases.
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